Together with other members of the Centre for Polar Observation and Modelling (CPOM) group, Rachel Tilling, our PhD student, presents the latest findings at the American Geophysical Union (AGU) 2014 meeting. Rachel is continuing the work of her late supervisor, Prof Seymour Laxon as she presents the first complete assessment of trends in northern hemisphere sea ice thickness and volume using 4 years of measurements from CryoSat-2. Between autumn 2010 and spring 2013, there was a 14% and 5% reduction in autumn and spring Arctic sea ice volume, respectively, in keeping with the long-term decline in extent. However, since then there has been a marked 41% and 9% recovery in autumn and spring sea ice volume, respectively, more than offsetting losses of the previous three years.
The recovery was driven by the retention of thick ice around north Greenland and Canada during summer 2013 which, in turn, was associated with a 6% drop in the number of days on which melting occurred – climatic conditions more typical of the early 1990’s. Such a sharp increase in volume after just one cool summer indicates that the Arctic sea ice pack may be more resilient than has been previously considered.
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